using Perforce.Helper;
using Perforce.P4;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace Perforce.ViewModel {
    public class DirectoryItemViewModel : ViewModelBase {

        public enum ItemStatus {
            Untracked,
            Add,
            Edit,
            Delete,
            Move,
            Mapped,
            Mixed
        }

        private FileMetaData _metadata;

        public FileMetaData Metadata {
            get { return _metadata; }
            set {
                _metadata = value;
                RefreshAllBindings();
            }
        }

        public void UpdateMetadata() {
            ListingHelper.UpdateDirectoryItem(this);
        }

        public void RefreshAllBindings() {
            OnPropertyChanged("");
        }

        private ResourceDictionary _resources;
        private string _labelText;
        private bool _isDirectory;
        private bool _isSelected;
        private int _viewerColumn;
        private ItemStatus _status;
        private ObservableCollection<FrameworkElement> _contextMenu;

        public Brush DefaultBackground {
            get { return UIHelper.GetCurrentSelector().ContentBackground; }
        }

        public ResourceDictionary Resources {
            get { return _resources; }
            set { _resources = value; }
        }

        public string DepotPath { 
             get { return _metadata.DepotPath != null ? _metadata.DepotPath.Path : null; }
        }
        public string ClientPath {
            get { return _metadata.ClientPath != null ? _metadata.ClientPath.Path : null; }
        }

        public bool IsEdit {
            get { return _metadata.Action.Equals(FileAction.Edit); }
        }

        public string Icon {
            get {
                StringBuilder resource = new StringBuilder();

                if (_isDirectory) {
                    resource.Append("Folder");
                    if (_metadata.IsMapped) {
                        resource.Append("Mapped");
                    } else {
                        resource.Append("Untracked");
                    }
                } else {
                    resource.Append("File");
                    if (IsMapped) {
                        var other = "";
                        var action = _metadata.Action;
                        if (_metadata.OtherActions != null && _metadata.OtherActions.Count > 0) {
                            other = "Other";
                            action = _metadata.OtherActions[0];
                        }
                        switch (action) {
                            case FileAction.None:
                                break;
                            case FileAction.Add:
                                resource.Append("Add");
                                break;
                            case FileAction.Edit:
                                resource.Append("Edit");
                                break;
                            case FileAction.Delete:
                                resource.Append("Delete");
                                break;
                            case FileAction.Move:
                                resource.Append("Move");
                                break;
                            case FileAction.MoveAdd:
                                resource.Append("MoveAdd");
                                break;
                            case FileAction.MoveDelete:
                                resource.Append("MoveDelete");
                                break;
                        }
                        resource.Append(other);
                    } else {
                        resource.Append("Untracked");
                    }
                }

                if (_isSelected) {
                    resource.Append("Selected");
                }
                var img = _resources[resource.ToString()] as Image;
                if (img != null) {
                    return img.Source.ToString();
                } else {
                    return "/Perforce;component/Resources/Icons/IconFile.png";
                }
            }
        }

        public bool IsMapped { get { return _metadata.IsMapped; } }
        public bool IsStale { get { return _metadata.IsStale; } }

        public string LabelText {
            get { return _labelText; }
            set {
                _labelText = value;
                OnPropertyChanged("LabelText");
            }
        }

        public bool IsDirectory {
            get { return _isDirectory; }
            set { 
                _isDirectory = value;
                OnPropertyChanged("IsDirectory");
            }
        }

        public bool IsSelected {
            get { return _isSelected; }
            set { 
                _isSelected = value;
                OnPropertyChanged("IsSelected");
                OnPropertyChanged("Icon");
            }
        }

        public ItemStatus Status {
            get { return _status; }
            set { 
                _status = value;
                OnPropertyChanged("ItemStatus");
            }
        }

        public int ViewerColumn {
            get { return _viewerColumn; }
            set { 
                _viewerColumn = value;
                OnPropertyChanged("ViewerColumn");
            }
        }

        public void RefreshData() {

            //var x = new FileMetaData();
            //var helper = Utility.GetProperty(Constants.PERFORCE_HELPER) as PerforceHelper;
            //if (IsDirectory) {
            //    // since directories don't have metadata in Perforce, we just have to 
            //    // get basic information about them
            //    IsMapped = helper.IsDirectoryMapped(DepotPath);
            //} else {
            //    // files have tons of metadata, so let's go to town
            //    var paths = new List<string>();
            //    paths.Add(DepotPath);
            //    var list = helper.GetFileMetaData(paths);
            //    if (list != null && list.Count == 1) {
            //        var md = list[0];
            //        ClientPath = md.ClientPath.Path;                    
            //        IsMapped = md.IsMapped;
            //        switch (md.Action) {
            //            case Perforce.P4.FileAction.Add:
            //                Status = ItemStatus.Add;
            //                break;
            //            case Perforce.P4.FileAction.Edit:
            //                Status = ItemStatus.Edit;
            //                break;
            //            default:
            //                Console.WriteLine("### ACTION: " + md.Action.ToString());
            //                break;
            //        }
            //    }
            //}
        }

        public ObservableCollection<FrameworkElement> ItemContextMenu {
            get {
                _contextMenu = new ObservableCollection<FrameworkElement>();
                _contextMenu.Add(new MenuItem { Header = LabelText, IsEnabled = false });
                _contextMenu.Add(new Separator());
                var currentSelector = UIHelper.GetCurrentSelector();
                if (currentSelector != null) {
                    switch (currentSelector.SelectorType) {
                        case SELECTOR_TYPE.WORKSPACE:
                            ConfigureWorkspaceContextMenu();
                            break;
                        case SELECTOR_TYPE.SERVER:
                            ConfigureServerContextMenu();
                            break;
                        case SELECTOR_TYPE.PENDING:
                            ConfigurePendingContextMenu();
                            break;
                        case SELECTOR_TYPE.RECENT:
                            ConfigureRecentContextMenu();
                            break;
                        case SELECTOR_TYPE.TRASH:
                            ConfigureTrashContextMenu();
                            break;
                        case SELECTOR_TYPE.FAVORITE:
                            ConfigureFavoriteContextMenu();
                            break;
                        case SELECTOR_TYPE.TAG:
                            ConfigureTagContextMenu();
                            break;
                    }
                }                
                return _contextMenu;
            }
        }

        private void ConfigureWorkspaceContextMenu() {
            _contextMenu.Add(new MenuItem { Header = "Open", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Open readonly", IsEnabled = false });
            if (_isDirectory) {
                _contextMenu.Add(new MenuItem { Header = "Edit all files", IsEnabled = false });
            } else {
                if (IsEdit) {
                    _contextMenu.Add(new MenuItem { Header = "Revert changes", IsEnabled = true, Command = new DelegateCommand(RevertFile) });
                } else {
                    _contextMenu.Add(new MenuItem { Header = "Edit file", IsEnabled = true, Command = new DelegateCommand(CheckoutFile) });
                }
            }
            _contextMenu.Add(new Separator());
            _contextMenu.Add(new MenuItem { Header = "Show in Explorer", IsEnabled = IsMapped, Command = new DelegateCommand(ShowInExplorer) });
            _contextMenu.Add(new MenuItem { Header = "Show Versions", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Copy link", IsEnabled = true, Command = new DelegateCommand(CopyLink) });
            _contextMenu.Add(new Separator());
            _contextMenu.Add(new MenuItem { Header = "Trash", IsEnabled = false });
        }

        private void ConfigureServerContextMenu() {
            if (_isDirectory) {
                if (IsMapped) {
                    _contextMenu.Add(new MenuItem { Header = "Unsync from computer", IsEnabled = true, Command = new DelegateCommand(UnsyncFromComputer) });
                } else {
                    _contextMenu.Add(new MenuItem { Header = "Sync with computer", IsEnabled = true, Command = new DelegateCommand(SyncWithComputer) });
                }
                _contextMenu.Add(new MenuItem { Header = "Copy link", IsEnabled = true, Command = new DelegateCommand(CopyLink) });
            } else {
                _contextMenu.Add(new MenuItem { Header = "Open", IsEnabled = false });
                _contextMenu.Add(new MenuItem { Header = "Open readonly", IsEnabled = false });
                _contextMenu.Add(new MenuItem { Header = "Open file from server", IsEnabled = true, Command = new DelegateCommand(OpenFromServer) });
                _contextMenu.Add(new Separator());
                _contextMenu.Add(new MenuItem { Header = "Show in Explorer", IsEnabled = IsMapped, Command = new DelegateCommand(ShowInExplorer) });
                _contextMenu.Add(new MenuItem { Header = "Show Versions", IsEnabled = false });
                _contextMenu.Add(new MenuItem { Header = "Copy link", IsEnabled = true, Command = new DelegateCommand(CopyLink) });
            }
        }

        private void ConfigurePendingContextMenu() {
            _contextMenu.Add(new MenuItem { Header = "Open", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Open readonly", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Submit", IsEnabled = false });
            _contextMenu.Add(new Separator());
            _contextMenu.Add(new MenuItem { Header = "Show in Explorer", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Show versions", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Copy link", IsEnabled = true, Command = new DelegateCommand(CopyLink) });
            _contextMenu.Add(new MenuItem { Header = "Revert changes", IsEnabled = false });
            _contextMenu.Add(new Separator());
            _contextMenu.Add(new MenuItem { Header = "Trash", IsEnabled = false });
        }

        private void ConfigureRecentContextMenu() {
            _contextMenu.Add(new MenuItem { Header = "Open", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Open readonly", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Submit", IsEnabled = false });
            _contextMenu.Add(new Separator());
            _contextMenu.Add(new MenuItem { Header = "Show in Explorer", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Show versions", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Copy link", IsEnabled = true, Command = new DelegateCommand(CopyLink) });
            _contextMenu.Add(new MenuItem { Header = "Revert changes", IsEnabled = false });
            _contextMenu.Add(new Separator());
            _contextMenu.Add(new MenuItem { Header = "Trash", IsEnabled = false });
        }

        private void ConfigureTrashContextMenu() {
            _contextMenu.Add(new MenuItem { Header = "Open", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Open readonly", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Submit", IsEnabled = false });
            _contextMenu.Add(new Separator());
            _contextMenu.Add(new MenuItem { Header = "Show in Explorer", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Show versions", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Copy link", IsEnabled = false });
            _contextMenu.Add(new MenuItem { Header = "Undo delete", IsEnabled = false });
        }

        private void ConfigureFavoriteContextMenu() {
        }

        private void ConfigureTagContextMenu() {
        }

        #region COMMANDS
        private void SyncWithComputer() {
            UIHelper.SetBusyState();
            var helper = Utility.GetProperty(Constants.PERFORCE_HELPER) as PerforceHelper;
            helper.IncludeInClient(DepotPath + "/...");
            RefreshData();
            OnPropertyChanged("ItemContextMenu");
        }

        private void UnsyncFromComputer() {
            UIHelper.SetBusyState();
            var helper = Utility.GetProperty(Constants.PERFORCE_HELPER) as PerforceHelper;
            helper.RemoveFromClient(DepotPath + "/...");
            RefreshData();
            OnPropertyChanged("ItemContextMenu");
        }

        private void OpenFromServer() {
            CommandHelper.OpenFileFromServer(DepotPath);
        }

        private void ShowInExplorer() {
            CommandHelper.ShowFileInExplorer(ClientPath);
        }

        private void CheckoutFile() {
            var helper = Utility.GetProperty(Constants.PERFORCE_HELPER) as PerforceHelper;
            helper.CheckoutFiles(false, "DepotPath");
            UpdateMetadata();
        }

        private void DeleteFile() {
            var helper = Utility.GetProperty(Constants.PERFORCE_HELPER) as PerforceHelper;
            helper.DeleteFiles(DepotPath);
            UpdateMetadata();
        }
        
        private void RevertFile() {
            var helper = Utility.GetProperty(Constants.PERFORCE_HELPER) as PerforceHelper;
            helper.RevertFiles(DepotPath);
            UpdateMetadata();
        }

        private void CopyLink() {
            if (DepotPath != null) {
                Clipboard.SetText(string.Format("p4:{0}", DepotPath));
            }
        }

        #endregion


    }
}